A novel fused iron catalyst for ammonia synthesis promoted with rare earth gangue
A novel fused iron catalyst for ammonia synthesis promoted with rare earth gangue作者机构:National Engineering Research Center of Chemical Fertilizer Catalyst Fuzhou University
出 版 物:《Journal of Rare Earths》 (稀土学报(英文版))
年 卷 期:2008年第26卷第5期
页 面:711-716页
核心收录:
学科分类:081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学]
基 金:the National Natural Science Foundation of China (20576021) Science & Technology Priority Project of Fujian Province (2005HZ01-2) National Key Technology R&D Program of China (2007BAE08B02)
主 题:rare earth gangue promoter fused iron catalyst ammonia synthesis
摘 要:Rare earth gangue, which mainly consists of mixtures of light rare earths such as lanthana, ceria, neodymium oxide and praseodymium oxide, was used as the promoter of fused iron catalysts for ammonia synthesis. The result showed that the activity of the catalyst promoted with rare earth gangue was comparable with those of commercial iron catalysts with high amount of cobalt. The role of rare earths was owed to their advantages for favoring the deep reduction of the main composite in catalyst, i.e., iron oxide. This fmding indicated that the use of rare earth gangue could decrease the content of cobalt or even completely replace cobalt, which was used to be regarded as unsub- stitutable promoters for high performance ammonia catalyst; therefore, the cost of fused iron catalysts would decrease significantly.